On Thu, 11 Aug 2016, Ritesh Raj Sarraf wrote: > Hello Alan, > > > On Wed, 2016-08-10 at 17:20 -0400, Alan Stern wrote: > > On Wed, 10 Aug 2016, Ritesh Raj Sarraf wrote: > > > > The device was disconnected electronically. > > > > How often does this happen? After the disconnect occurs, does the card > > reader remain disconnected until the next power cycle? > > > > If I look at the systemd journal logs, this has been happening for months, or > rather right from the time I've installed Linux on it. The bug does not trigger > rightaway on boot. It mostly looks to be happening when power saving values are > enabled for the USB devices. > > I said mostly, because for example, on this boot, while the power savings are > active, the kernel has not reported any error. > Part of the reason could also be because I blacklisted this specific USB device > id under my power saving tool. But I need to check/confirm that. > > Once the bug is triggered, reboots still inherit the problem. A proper power off > and start is the way to avoid the bug then. > > > > Upon reboot too, I noticed the error reported way early during initrd. > > > > > > After a full poweroff and boot, the usb device was back to being listed as > > > normal. > > > > > > > > > Is this a sign of the USB device going bad? > > > > Probably. > > > > > Or is it just another bug in Linux USB? > > > > Another?? Are there other bugs affecting you? > > > > I guess so. I get frequent resets on my USB port for some of the hardware. > > kernel: usb 2-1: reset high-speed USB device number 17 using xhci_hcd > > I initially thought of this to be a faulty cable. But the same cable works fine > on another laptop. There could be bad cabling inside the computer. > I'm not sure if these resets could be related to the card reader issue above. Probably not, but with no other information it's impossible to be certain. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
